Some links I've found interesting Puzzles, Optical Illusions, and more Puzzles archive some very nice puzzles from rec.puzzles
Puzzle archives almost the same material: rec.puzzles
Gray labyrinth
Mathemathical puzzles
Riddle du jour
MindBreakers
Olympiad math madness - real math problems
Riddler - a bit too much advertising
Optical Illusions - very nice site
Psychology games - nice, but don't take it too seriously..
Survey central - you might like this one
Friends with page Cristian Levcovici
Cristian Cheran
Alexandru Salcianu
Computer science Vanguard Advisors: Alan Kay
JohnMcCarthy
Stanford
Computer Science (France) Laboratoire de Recherche en Informatique
LaRechercheParis-Sud
DEA Semantique, Preuves et Programmation
Divertisment Diann's Nameless Lair
Starting Point
WWW & HTML Resources Making Animated GIFs (part 2 of 3)
Tools & Tips
WWWStuff-pages
EnderDesign:RealmGraphics Web Images
Books Directory Browser
TheBookWireIndex - Booksellers
ALife Artificial Life Online
Software FREEWARE/ SHAREWARE (FTP)
OpenGl, 3D libraries OpenGL WWW Center
Mesa 3-D graphics library
OpenGL WWW Pages Intro
GLX Specification
GLUT API, version 3
GLUT 3.6
Glut
Debian Package - glut-dev
Miscellaneous Wordnet, the online english dictionary
Nikos Drakos Home page
Peter's Home Page
Putnam Berkley Online | 
